In Unstoppable, young Portal Masters get their chance to guide the heroes of Skylanders SWAP Force through a collection of fun puzzles. You can use your stickers to complete the activities and help the Skylanders to victory. SWAP Force characters such as Blast Zone and Wash Buckler are joined by familiar favourites from the fantastical Skylanders Universe. Unstoppable is based on the smash-hit third Skylanders video game, Skylanders SWAP Force.